class Point():
    x = 0.0
    y = 0.0

    def __init__(self, x, y):
        self.x = x
        self.y = y
        print("Point constructor")

    def tostring(self):
        return "{X:" + str(self.x) + ",Y:" + str(self.y) + "}"

class A(Point):
    t = 0.0
    def __init__(self, x, y, t):
        super().__init__(x, y)
        self.t = t


    def tostring(self):
        print(0)



a = A(9, 0, 9)
print(a.tostring())


